- Post Office and Civil Service Committee, House5
- Post Office and Post Roads Committee229
- Post Office and Post Roads Committee, House77
- Post-Office and Post-Roads Committee44
- Post-War Economic Policy and Planning, Special Committee on, House2
- Post-War Military Policy, Select Committee on, House3
- Postage on 2d-Class Mail Matter and Compensation for Transportation of Mails, Joint Committee on3
- Postal Service Joint Commission2
- Printing Committee233
- Printing Committee, House8
- Printing Joint Committee9
- Private Land Claims Committee25
- Privileges and Elections Committee4
- Public Buildings and Grounds Committee516
- Public Buildings and Grounds Committee, House43
- Public Health and National Quarantine Committee1
- Public Lands Committee1,209
- Public Lands Committee, House69
- Public Lands and Surveys Committee65
- Public Service, Select Committee on Appropriations for Prevention of Fraud in and Depredations upon4